This Oct. 6, 1906 stereo photograph provided by the Smithsonian National Museum of American History shows earthquake-damaged San Francisco. (AP Photo/National Museum of American History, Frederick Eugene Ives)

(Newser)
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The San Francisco area was jolted by a small earthquake on the 105th anniversary of the 1906 quake that killed thousands and leveled much of the city. Nobody was injured by yesterday's 3.7 magnitude quake, but thousands of homes lost power for close to an hour, the San Francisco Chronicle reports. "What this earthquake does is serve as a good reminder for us to make sure we are prepared for the next big one," said a US Geological Survey spokesman.

Dozens of people had gathered in the city earlier in the day to commemorate the 1906 quake, including Bill DelMonte, one of only three known quake survivors still alive. Red Cross volunteers collected donations for the Japanese quake and tsunami relief effort. Japan aided San Francisco in 1906, donating $250,000 to help the city's recovery, more than any other country.

This website tracks seismic activity worldwide: http://www.emsc-csem.org/Earthquake/index.php?view=1 Notice the sensitivity. Activity as weak as 2 is reported anywhere in the world. Now, all times on the Real Time Seismicity site are UTC and converting UTC to local can be tricky (unless you're good at arithmetic and know whether to add or subtract ;